Adhomukh Nakshatra - Adho Mukha Nakshatra
Mool Nakshatra, Ashlesha, Mishra Nakshatra (Krutika Nakshatra, Vishaka Nakshatra), Ugra Nakshatra (Purvafalguni, Purvashada, Purvobhadrapad, Magha, Bharni), all of these nine Nakshatras are known as Adhomukh Nakshatra.
Activities which happen under the ground can be carried out in these Nakshatras. For example : boring tube well, digging a tunnel, constructing subways, constructing basements, digging for some important task etc. It is fine to do all those tasks which involve an upward to downward movement. This category also includes landing a plane, climbing down a mountain, diving in water, swimming etc.